revert: restore original interface.go

internal/blocker/interface.go

@@ -1,19 +1,6 @@
 package blocker
 
-// BlockerEngine defines the interface for all firewall implementations
 type BlockerEngine interface {
-	// Core operations
 	Ban(ip string) error
 	Unban(ip string) error
-
-	// Lifecycle management
-	Setup() error
-	Close() error
-
-	// Query operations
-	List() ([]string, error)
-
-	// Metadata
-	Name() string
-	IsAvailable() bool
 }